The Weekly Volcanic Activity Report: April 23-29, 2026
New activity/unrest was reported for 3 volcanoes from April 23 to 29, 2026. During the same period, ongoing activity was reported for 24 volcanoes.
Magma accumulation exceeds 25 million m³ beneath Svartsengi, Iceland
More than 25 million m³ (883 million ft³) of magma has accumulated beneath Svartsengi, Iceland, since the last eruption in July 2025, the Icelandic Meteorological Office (IMO) reported on April 28, 2026. IMO said ground uplift continues at up to 2 cm (0.8 inches) per month, while magmatic dike propagation toward the Sundhnúkur crater row remains the most likely scenario and could lead to an eruption.
The Weekly Volcanic Activity Report: April 16-22, 2026
New activity/unrest was reported for 4 volcanoes from April 16 to 22, 2026. During the same period, ongoing activity was reported for 23 volcanoes.
Kīlauea eruption episode 45 peaks early with 300 m (1 000 feet) lava fountains and ash advisory for Kaʻū, Hawaiʻi
Lava fountains rising to 300 m (1 000 feet) and an ash plume reaching 5 000 m (16 500 feet) marked the onset of episode 45 at Kīlauea on April 23, 2026, triggering an ashfall advisory for Kaʻū. Activity remained confined within Halemaʻumaʻu as fountain heights stabilized after an early peak.
Pico volcano system raised to V1 alert after increased seismicity in Faial–Pico channel, Portugal
Authorities raised the volcanic alert level to V1 in the Faial–Pico channel, Azores, Portugal, on April 9, 2026, following low-magnitude seismic activity that began on April 1. The earthquakes occurred along a NE–SW trend west of Madalena to north of Lagido, spanning depths from 20 km (12 miles) to near the surface. The last known eruption at this volcano took place in 1720, with a Volcanic Explosivity Index (VEI) of 2.
The Weekly Volcanic Activity Report: April 9-15, 2026
New activity/unrest was reported for 3 volcanoes from April 9 to 15, 2026. During the same period, ongoing activity was reported for 17 volcanoes.
Mount Dempo eruption sends ash up to 7.6 km (25 000 feet) above sea level, Indonesia
Mount Dempo in South Sumatra, Indonesia, erupted at 04:45 UTC on April 15, 2026, sending volcanic ash as high as 7.6 km (25 000 feet) above sea level and prompting Indonesia’s volcano agency to raise the Aviation Color Code to Red. The eruption follows a phreatic blast on April 7 and inflation detected from April 2.
Tephra up to 25 cm (10 inches) reported in the Volcano Golf Course subdivision during Kīlauea eruption episode 44, Hawaiʻi
Tephra up to 25 cm (10 inches) was reported in the Volcano Golf Course subdivision near Kīlauea, Hawaiʻi, during episode 44 of the ongoing summit eruption, which ended at 05:41 UTC on April 10, 2026, after 8 hours and 31 minutes of lava fountaining. The eruption generated 5.8 million m³ (7.5 million cubic yards) of lava, while ash and Pele’s hair reached as far as Hilo, prompting warnings and temporary closures.
The Weekly Volcanic Activity Report: April 2-8, 2026
New activity/unrest was reported for 6 volcanoes from April 2 to 8, 2026. During the same period, ongoing activity was reported for 17 volcanoes.
Explosive eruption at Sheveluch sends ash to 11 km (36 000 feet), Aviation Code Raised to Red, Russia
Explosive activity at Sheveluch volcano, Kamchatka, Russia, sent volcanic ash to 11 km (36 000 feet) above sea level on March 29, 2026, prompting authorities to raise the Aviation Color Code to Red.
